16993451 has 8 divisors (see below), whose sum is σ = 17367504. Its totient is φ = 16623360.

The previous prime is 16993439. The next prime is 16993463. The reversal of 16993451 is 15439961.

It is an interprime number because it is at equal distance from previous prime (16993439) and next prime (16993463).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16993451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16993051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8675 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (2170938).

Almost surely, 2^16993451 is an apocalyptic number.

16993451 is a deficient number, since it is larger than the sum of its proper divisors (374053).

16993451 is a wasteful number, since it uses less digits than its factorization.

16993451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its digits is 29160, while the sum is 38.

The square root of 16993451 is about 4122.3113662119. The cubic root of 16993451 is about 257.0951365443.

The spelling of 16993451 in words is "sixteen million, nine hundred ninety-three thousand, four hundred fifty-one".